Mel Gorman 7dbd13ed06 sched/numa: Prevent parallel updates to group stats during placement ...

Having multiple tasks in a group go through task_numa_placement
simultaneously can lead to a task picking a wrong node to run on, because
the group stats may be in the middle of an update. This patch avoids
parallel updates by holding the numa_group lock during placement
decisions.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-52-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2013-10-09 14:48:02 +02:00

..

auto_group.c

sched/autogroup: Fix race with task_groups list

2013-05-28 09:40:22 +02:00

auto_group.h

Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"

2012-12-11 10:23:45 +01:00

clock.c

sched_clock: Prevent 64bit inatomicity on 32bit systems

2013-04-08 11:50:44 +02:00

core.c

sched/numa: Stay on the same node if CLONE_VM

2013-10-09 14:47:57 +02:00

cpuacct.c

cgroup: pass around cgroup_subsys_state instead of cgroup in file methods

2013-08-08 20:11:24 -04:00

cpuacct.h

sched/cpuacct: Initialize root cpuacct earlier

2013-04-10 13:54:20 +02:00

cpupri.c

sched: Fix some kernel-doc warnings

2013-07-18 09:58:21 +02:00

cpupri.h

…

cputime.c

Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-09-05 12:36:46 -07:00

debug.c

sched/debug: Take PID namespace into account

2013-09-12 19:14:16 +02:00

fair.c

sched/numa: Prevent parallel updates to group stats during placement

2013-10-09 14:48:02 +02:00

features.h

sched/numa: Resist moving tasks towards nodes with fewer hinting faults

2013-10-09 12:40:27 +02:00

idle_task.c

sched/numa: Introduce migrate_swap()

2013-10-09 12:40:46 +02:00

Makefile

sched: Factor out load calculation code from sched/core.c --> sched/proc.c

2013-05-07 13:14:50 +02:00

proc.c

sched: Change get_rq_runnable_load() to static and inline

2013-06-27 10:07:44 +02:00

rt.c

sched/numa: Introduce migrate_swap()

2013-10-09 12:40:46 +02:00

sched.h

sched/numa: Call task_numa_free() from do_execve()

2013-10-09 14:48:00 +02:00

stats.c

fix a leak in /proc/schedstats

2013-04-29 15:41:45 -04:00

stats.h

sched: Micro-optimize by dropping unnecessary task_rq() calls

2013-09-25 13:51:06 +02:00

stop_task.c

sched/numa: Introduce migrate_swap()

2013-10-09 12:40:46 +02:00